import javax.swing.*; public class MyFrame extends JFrame{ piublic MyFrame(){ this.setTitle("这是我第一个窗口"); this.setSize(300,300); this.setResizable(false); this.setVisible(true); } public static void main(String args[]){ MyFrame frame1=new MyFrame(); } }
import java.awt.*; public class ContenPaneDemo extends JFrame{ public ContentPaneDemo(){ super("我喜欢的第一个明星张国荣"); Container contentPane=this.getContentPane();//这代码有什么作用 contentPane.setBackground(Color.cyan); this.setSize(300,300); this.setResizable(false); this.setVisible(true); public static void main(String args[]){ ContentPaneDemo lesile=new ContentPaneDemo(); } }